Russia Ukraine war, page-133772

well , I don't see it would be too hard to do with the right people and some explosive and first on my list would be "greenies" of some variety .
(you could see why they want it kept quiet )
Second would be a pro-Ukrainian group of some sort who have obvious motive .
Very vague ideas but as I said I have an open mind ...just not prepared to accept any possibility until proven .

Beyond that I don't know .